private void detach_rooms(room entity)
		{
			this.SendPropertyChanging();
			entity.facility = null;
		}
		private void attach_rooms(room entity)
		{
			this.SendPropertyChanging();
			entity.facility = this;
		}
 partial void Updateroom(room instance);
 partial void Deleteroom(room instance);
 partial void Insertroom(room instance);